We can do the English-Japanese translation
"no" is ない and "problem" is 問題 in Japanese
No problem = 問題はない
30 ธันวาคม 2009
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Daijoubu (des)!
27 ธันวาคม 2009
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It can also be 「大したことではない」, or even something along the lines of 「どういたしまして」.
It's hard to answer this exactly without having the context; "no problem" is a rather broad expression you know.